* src/conflicts.c (conflicts_output): Don't output rules never

reduced here, since anyway that computation doesn't work.
* src/gram.h, src/gram.h (rule_filter_t, rule_useful_p)
(rule_useless_p, rule_never_reduced_p): New.
(grammar_rules_partial_print): Use a filter instead of a range.
Display the title only if needed.
(grammar_rules_print): Adjust.
(grammar_rules_never_reduced_report): New.
* src/tables.c (action_row): Move the computation of rules never
reduced to...
(token_actions): here.
* src/main.c (main): Make the parser before making the report, so
that rules never reduced are computed.
Call grammar_rules_never_reduced_report.
* src/print.c (print_results): Report rules never reduced.
* tests/conflicts.at, tests/reduce.at: Adjust.

src/main.c

@@ -108,6 +108,14 @@ main (int argc, char *argv[])
   conflicts_print ();
   timevar_pop (TV_CONFLICTS);
 
+  /* Compute the parser tables.  */
+  timevar_push (TV_ACTIONS);
+  tables_generate ();
+  timevar_pop (TV_ACTIONS);
+
+  grammar_rules_never_reduced_report
+    (_("rule never reduced because of conflicts"));
+
   /* Output file names. */
   compute_output_file_names ();
 
@@ -119,11 +127,6 @@ main (int argc, char *argv[])
       timevar_pop (TV_REPORT);
     }
 
-  /* Stop if there were errors, to avoid trashing previous output
-     files.  */
-  if (complain_message_count)
-    exit (1);
-
   /* Output the VCG graph.  */
   if (graph_flag)
     {
@@ -132,10 +135,10 @@ main (int argc, char *argv[])
       timevar_pop (TV_GRAPH);
     }
 
-  /* Compute the parser tables.  */
-  timevar_push (TV_ACTIONS);
-  tables_generate ();
-  timevar_pop (TV_ACTIONS);
+  /* Stop if there were errors, to avoid trashing previous output
+     files.  */
+  if (complain_message_count)
+    exit (1);
 
   /* Lookaheads are no longer needed. */
   timevar_push (TV_FREE);